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preface to fifteenth edition

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8.68 SECTION 8<br />

TABLE 8.8<br />

pK a Values of Organic Materials in Water at 25C (Continued)<br />

Substance pK 1 pK 2 pK 3 pK 4<br />

Serine, methyl ester ( 0.1) 7.03(1)<br />

Serylglycine ( 0.15) 2.10(1) 7.33(0)<br />

L-Seryl-L-leucine 3.08(1) 7.45(0)<br />

Solanine<br />

7.34(1)<br />

D-Sorbi<strong>to</strong>l (17.5C) 13.60<br />

L-()-Sorbose (18C) 11.55<br />

Sparteine 4.49(1) 11.76(0)<br />

Spinaceamine ( 0.1) 4.895(2) 8.90(1)<br />

Spinacine 1.649(2) 4.936(1) 8.663(0)<br />

L-Strychnine (15C) 2.50 8.20<br />

Succinamic acid (succinic acid 4.39(0)<br />

monoamide)<br />

Succinic acid 4.207 5.635<br />

DL-Succinimide 9.623<br />

-(4-Sulfaminophenyl)alanine 1.99(1) 8.64(0) 10.26(1)<br />

3-Sulfamylbenzoic acid 3.54<br />

4-Sulfamylbenzoic acid 3.47<br />

4-Sulfamylphenylphosphoric acid 1.42 6.38 10.0<br />

Sulfanilamide<br />

10.43(1)<br />

Sulfoacetic acid — 4.0<br />

3-Sulfobenzoic acid — 3.78<br />

4-Sulfobenzoic acid — 3.72<br />

3-Sulfophenol 0.39 9.07<br />

4-Sulfophenol 0.58 8.70<br />

2-Sulfopropanoic acid 1.99<br />

5-Sulfosalicyclic acid 2.49 12.00<br />

Sylvic acid 7.62<br />

D-Tartaric acid 3.036 4.366<br />

meso-Tartaric acid 3.22 4.81<br />

Tetracycline ( 0.005) 3.30(1) 7.68 9.69<br />

Tetradehydroyohimbine<br />

10.59(1)<br />

Tetraethylenepentamine [ 0.1; 2.98(5) 4.72(4) 8.08(3) 9.10(2)<br />

pK 5 9.67(1)]<br />

1,4,5,6-Tetrahydro-1,2-dimethylpyridine<br />

11.38(1)<br />

1,4,5,6-Tetrahydro-2-methylpyridine<br />

9.53(1)<br />

cis-Tetrahydronaphthalene-2,3-dicarboxylic<br />

3.98 6.47<br />

acid (20C)<br />

trans-Tetrahydronaphthalene-2,3- 4.00 5.70<br />

dicarboxylic acid (20C)<br />

5,6,7,8-Tetrahydro-1-naphthol 10.28<br />

5,6,7,8-Tetrahydro-2-naphthol 10.48<br />

Tetrahydroserpentine<br />

10.55(1)<br />

2,3,5,6-Tetramethylbenzoic acid 3.415<br />

Tetramethylenebis(thioacetic acid) 3.463 4.423<br />

(18C)<br />

Tetramethylenediamine 9.22(2) 10.75(1)<br />

N,N,N,N-Tetramethylethylenediamine<br />

2.20(2) 6.35(1)<br />

2,3,5,6-Tetramethyl-4-methylaminopyridine<br />

0.07(1)

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